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Latest Evolution of mammals Stories

Mammal Diversity Faltered When Flowering Plants Arrived
2013-10-02 16:02:24

Brett Smith for redOrbit.com - Your Universe Online As mammals were trying to emerge from the shadows of dinosaurs 100 million years ago, there was a dramatic proliferation of flowering plant species. However, instead of early mammals benefiting from new food and shelter opportunities that would have been provided by the plants, they experienced a decline during the mid-Cretaceous. Using a morphological analysis, two researchers were able to provide these new insights about mammalian...

New Fossil Proto-Mammal Found
2013-08-08 10:01:35

Brett Smith for redOrbit.com - Your Universe Online A newly discovered skeleton has evolutionary biologists adding new details to the story of mammalian evolution. The fossilized skeleton belongs to a proto-mammal that lived 165 million years ago in northeast China and had hair well before the emergence of true mammals, according to a report of the find that appeared in the journal Nature. For years, paleontologists' only evidence of the species was a few fossilized...

Large-Scale Study Reconstructs Earliest Mammalian Ancestor
2013-02-07 14:05:44

[Watch Video: Reconstructing Common Ancestor Of Placental Mammals] Lee Rannals for redOrbit.com — Your Universe Online A team from Carnegie Museum of Natural History have completed the largest-ever study of mammalian ancestors, helping to construct what the common ancestor of all mammals may have looked like. The six-year research project looked at the evolution of placental mammals, which are the largest branch of the mammalian family tree with over 5,100 living species....

Mammalian Evolution Mirrors Climate Change
2011-12-27 05:39:51

A recent study by an international group of evolutionary biologists has pointed to six broad yet distinct ℠waves´ of climate-induced mammalian diversity in the last 65 million years of evolution. Researchers say that extended periods of warming and cooling appear to signal the shift from one dominant grouping of mammals to the next. In the online version of the journal The Proceedings of the National Academy of Sciences (PNAS), Professor Christine Janis of Brown University and a...

Whiskers Were An Important Evolutionary Milestone For Mammals
2011-11-11 12:53:35

Researchers have found that moveable whiskers on rats and mice were an important milestone in the evolution of mammals from reptiles. The team used high-speed digital video recording and automatic tracking to discover how rodents move their whiskers back-and-forth at high speed. This behavior, known as whisking, allows mice or rats to accurately determine the position, shape and texture of objects, make decisions about objects, and use the information to build environmental maps. The...

Researchers Discover 41 Million Old Rodent Fossils
2011-10-12 11:51:13

Researchers have discovered the oldest rodent fossils yet along the Ucayali River near Contamana, Peru. The fossils are comprised of the tiny teeth of a mouse-and rat-sized animal that lived at least 41 million years ago. These fossils are about 10 million years older than all previous rodent discoveries made. "This really pushes back the date of the first South American rodents," said Darin Croft, an anatomy professor at Case Western Reserve University School of Medicine, Cleveland,...

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2011-08-25 11:05:58

  A well-preserved fossil discovered in China provides new evidence that the split between placental mammals and marsupials may have occurred 35 million years earlier than previously believed, according to a new study published Wednesday in the journal Nature. The scientists, led by Carnegie Museum of Natural History paleontologist Zhe-Xi Luo, said the discovery fills an important gap in the fossil record, and helps to calibrate modern, DNA-based methods of dating evolution. The...

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2011-05-19 14:40:00

Paleontologists have discovered that an improved sense of smell jumpstarted brain evolution in the ancestral cousins of present-day mammals.  The findings help explain why mammals evolved such large and complex brains, which in some cases ballooned 10 times larger than relative body size.  The researchers constructed fossils of two Early Jurassic Period mammals to provide evidence that the mammalian brain evolved in three major stages.  First by improvements in sense of smell...

2010-11-17 13:30:32

The nine-month pregnancy in humans is influenced by the structure of the placenta, according to new research into the evolution of reproduction in mammals which ends a 100-year mystery. The study, by Durham and Reading universities, shows that babies grow twice as fast in the wombs of some mammals compared to others. The difference in growth rates appears to be due to the structure of the placenta and the way it connects mother and baby. The research has found that the more intimate the...

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2010-10-12 23:26:30

University of Florida researchers presenting new fossil evidence of an exceptionally well-preserved 55-million-year-old North American mammal have found it shares a common ancestor with rodents and primates, including humans.The study, scheduled to appear in the Oct. 11 online edition of the Zoological Journal of the Linnean Society, describes the cranial anatomy of the extinct mammal, Labidolemur kayi. High resolution CT scans of the specimens allowed researchers to study minute details in...


Word of the Day
callithump
  • A somewhat riotous parade, accompanied with the blowing of tin horns, and other discordant noises; also, a burlesque serenade; a charivari.
'Callithump' is a back-formation of 'callithumpian,' a 'fanciful formation' according to the Oxford English Dictionary. However, the English Dialect Dictionary, says 'Gallithumpians' is a Dorset and Devon word from the 1790s that refers to 'a society of radical social reformers' or 'noisy disturbers of elections and meetings.'
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